Finding the Fourth Proportional to 16,399.68, 22,626.72 and 9,685.86

Step by Step Solution

1. Step 1: Write the proportion equation
   16,399.68 : 22,626.72 = 9,685.86 : x
2. Step 2: Convert to fraction form
   16,399.68/22,626.72 = 9,685.86/x
3. Step 3: Cross multiply
   16,399.68x = 22,626.72 × 9,685.86
4. Step 4: Simplify right side
   16,399.68x = 219,159,242.18
5. Step 5: Solve for x
   x = 219,159,242.18/16,399.68
6. Step 6: Final answer
   x = 13,363.63